So a loaded gun was left under the front seat and the child was not in a child seat.

First off why would a child look under the front seat to find a gun? Secondly why would a police officer forget that he left it there?

Stupid is as stupid does - yes we need more gun control - contol over stupid people like this - he needs to be locked up for carelessness for the expenseses he caused the insurance company and the hospitals for his emergency.

I'm not opposed to the insurance idea. I think it's actually a pretty good and fair idea.... For instance if some guy shoots someone like Dick Cheney did back in the day or if someone shoots someone without "just cause" or in a burglary etc...

Um, yeah, there will never be a solution to all accidental injuries and deaths. I hate to break this news to you, and both of your brain cells were red-lining to make this assessment, but the world will never be free of risk.